Eucalyptus obliqua seedling growth in organic vs. mineral soil horizons

Karen M. Barry, David Janos, Scott Nichols, David M J S Bowman

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Eucalyptus obliqua, the most widespread timber tree in Tasmania, is a pioneer after fire which can eliminate the organic layer of forest soil, exposing the underlying mineral soil. We compared seedling growth, mycorrhiza formation, and mineral nutrient limitation in organic layer vs. mineral soil. We grew E. obliqua seedlings separately in pots of organic layer and mineral soil in a glasshouse. Additional treatments of organic soil only, involved fully crossed methyl-bromide fumigation and fertilization. Fertilization comprised chelated iron for 121 days after transplant (DAT) followed by soluble phosphorus. At 357 DAT, whole plant dry weight was three times greater in ambient organic than in mineral soil. In organic soil, fumigation halved ectomycorrhiza abundance and reduced seedling growth at 149 DAT, but by 357 DAT when negative effects of fumigation on seedling growth had disappeared, neither fumigation nor fertilization affected mycorrhiza abundance. Iron fertilization diminished seedling growth, but subsequent phosphorus fertilization improved it. E. obliqua seedlings grow much better in organic layer soil than in mineral soil, although phosphorus remains limiting. The prevalent forestry practice of burning to mineral soil after timber harvest exposes a poor growth medium likely only partially compensated by fire-induced mineral soil alterations.

Original languageEnglish
Article number97
JournalFrontiers in Plant Science
Volume6
Issue numberFEB
DOIs
StatePublished - Feb 20 2015

Fingerprint

Eucalyptus obliqua
soil horizons
mineral soils
seedling growth
fumigation
organic soils
mycorrhizae
phosphorus
iron
soil fumigation
silvicultural practices
seedlings
ectomycorrhizae
methyl bromide
Tasmania
forest trees
forest soils
culture media
minerals
greenhouses

Keywords

  • Ashbed effect
  • Ectomycorrhiza
  • Mineral nutrition
  • Phosphorus limitation
  • Soil fumigation

ASJC Scopus subject areas

  • Plant Science

Cite this

Eucalyptus obliqua seedling growth in organic vs. mineral soil horizons. / Barry, Karen M.; Janos, David; Nichols, Scott; Bowman, David M J S.

In: Frontiers in Plant Science, Vol. 6, No. FEB, 97, 20.02.2015.

Research output: Contribution to journalArticle

Barry, Karen M. ; Janos, David ; Nichols, Scott ; Bowman, David M J S. / Eucalyptus obliqua seedling growth in organic vs. mineral soil horizons. In: Frontiers in Plant Science. 2015 ; Vol. 6, No. FEB.
@article{917e4caaea044ef0bf9f35d9e1a2dbd6,
title = "Eucalyptus obliqua seedling growth in organic vs. mineral soil horizons",
abstract = "Eucalyptus obliqua, the most widespread timber tree in Tasmania, is a pioneer after fire which can eliminate the organic layer of forest soil, exposing the underlying mineral soil. We compared seedling growth, mycorrhiza formation, and mineral nutrient limitation in organic layer vs. mineral soil. We grew E. obliqua seedlings separately in pots of organic layer and mineral soil in a glasshouse. Additional treatments of organic soil only, involved fully crossed methyl-bromide fumigation and fertilization. Fertilization comprised chelated iron for 121 days after transplant (DAT) followed by soluble phosphorus. At 357 DAT, whole plant dry weight was three times greater in ambient organic than in mineral soil. In organic soil, fumigation halved ectomycorrhiza abundance and reduced seedling growth at 149 DAT, but by 357 DAT when negative effects of fumigation on seedling growth had disappeared, neither fumigation nor fertilization affected mycorrhiza abundance. Iron fertilization diminished seedling growth, but subsequent phosphorus fertilization improved it. E. obliqua seedlings grow much better in organic layer soil than in mineral soil, although phosphorus remains limiting. The prevalent forestry practice of burning to mineral soil after timber harvest exposes a poor growth medium likely only partially compensated by fire-induced mineral soil alterations.",
keywords = "Ashbed effect, Ectomycorrhiza, Mineral nutrition, Phosphorus limitation, Soil fumigation",
author = "Barry, {Karen M.} and David Janos and Scott Nichols and Bowman, {David M J S}",
year = "2015",
month = "2",
day = "20",
doi = "10.3389/fpls.2015.00097",
language = "English",
volume = "6",
journal = "Frontiers in Plant Science",
issn = "1664-462X",
publisher = "Frontiers Media S. A.",
number = "FEB",

}

TY - JOUR

T1 - Eucalyptus obliqua seedling growth in organic vs. mineral soil horizons

AU - Barry, Karen M.

AU - Janos, David

AU - Nichols, Scott

AU - Bowman, David M J S

PY - 2015/2/20

Y1 - 2015/2/20

N2 - Eucalyptus obliqua, the most widespread timber tree in Tasmania, is a pioneer after fire which can eliminate the organic layer of forest soil, exposing the underlying mineral soil. We compared seedling growth, mycorrhiza formation, and mineral nutrient limitation in organic layer vs. mineral soil. We grew E. obliqua seedlings separately in pots of organic layer and mineral soil in a glasshouse. Additional treatments of organic soil only, involved fully crossed methyl-bromide fumigation and fertilization. Fertilization comprised chelated iron for 121 days after transplant (DAT) followed by soluble phosphorus. At 357 DAT, whole plant dry weight was three times greater in ambient organic than in mineral soil. In organic soil, fumigation halved ectomycorrhiza abundance and reduced seedling growth at 149 DAT, but by 357 DAT when negative effects of fumigation on seedling growth had disappeared, neither fumigation nor fertilization affected mycorrhiza abundance. Iron fertilization diminished seedling growth, but subsequent phosphorus fertilization improved it. E. obliqua seedlings grow much better in organic layer soil than in mineral soil, although phosphorus remains limiting. The prevalent forestry practice of burning to mineral soil after timber harvest exposes a poor growth medium likely only partially compensated by fire-induced mineral soil alterations.

AB - Eucalyptus obliqua, the most widespread timber tree in Tasmania, is a pioneer after fire which can eliminate the organic layer of forest soil, exposing the underlying mineral soil. We compared seedling growth, mycorrhiza formation, and mineral nutrient limitation in organic layer vs. mineral soil. We grew E. obliqua seedlings separately in pots of organic layer and mineral soil in a glasshouse. Additional treatments of organic soil only, involved fully crossed methyl-bromide fumigation and fertilization. Fertilization comprised chelated iron for 121 days after transplant (DAT) followed by soluble phosphorus. At 357 DAT, whole plant dry weight was three times greater in ambient organic than in mineral soil. In organic soil, fumigation halved ectomycorrhiza abundance and reduced seedling growth at 149 DAT, but by 357 DAT when negative effects of fumigation on seedling growth had disappeared, neither fumigation nor fertilization affected mycorrhiza abundance. Iron fertilization diminished seedling growth, but subsequent phosphorus fertilization improved it. E. obliqua seedlings grow much better in organic layer soil than in mineral soil, although phosphorus remains limiting. The prevalent forestry practice of burning to mineral soil after timber harvest exposes a poor growth medium likely only partially compensated by fire-induced mineral soil alterations.

KW - Ashbed effect

KW - Ectomycorrhiza

KW - Mineral nutrition

KW - Phosphorus limitation

KW - Soil fumigation

UR - http://www.scopus.com/inward/record.url?scp=84923264820&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923264820&partnerID=8YFLogxK

U2 - 10.3389/fpls.2015.00097

DO - 10.3389/fpls.2015.00097

M3 - Article

AN - SCOPUS:84923264820

VL - 6

JO - Frontiers in Plant Science

JF - Frontiers in Plant Science

SN - 1664-462X

IS - FEB

M1 - 97

ER -